The nitrogen cycle

By |2025-02-12T09:03:20+02:00February 12th, 2025|Notes, O Level Science Notes, Ordinary Level Notes|

Nitrogen fixing roots in legumes. Image credit MediaWiki Nitrogen fixing roots in legumes. Image credit MediaWiki ZIMSEC O Level Combined Science Notes: The nitrogen cycle

  • Nitrogen makes up 79% of the atmosphere
  • Animals cannot absorb Nitrogen as a gas
  • They absorb it indirectly usually as part of food
  • Recycling of nitrogen is carried out […]